Trixie's on the trail of a century-old mystery! She's headed to Williamsburg, Virginia, to find an old plantation house, Rosewood Hall, that was the home to the Sunderland family during the Civil War. Rumor has it that a cursed emerald necklace is buried in a secret passageway there. But after all that time, Rosewood Hall is just a ruin. Is it too late for Trixie to find the missing emeralds?